Document Detail

Parabolic flight: loss of sense of orientation.
MedLine Citation:
PMID:  493998     Owner:  NLM     Status:  MEDLINE    
On the earth, or in level flight, a blindfolded subject being rotated at constant velocity about his recumbent long body axis experiences illusory orbital motion of his body in the opposite direction. By contrast, during comparable rotation in the free-fall phase of parabolic flight, no body motion is perceived and all sense of external orientation may be lost; when touch and pressure stimulation is applied to the body surface, a sense of orientation is reestablished immediately. The increased gravitoinertial force period of a parabola produces an exaggeration of the orbital motion experienced in level flight. These observations reveal an important influence of touch, pressure, and kinesthetic information on spatial orientation and provide a basis for understanding many of the postural illusions reported by astronauts in space flight.
J R Lackner; A Graybiel
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Science (New York, N.Y.)     Volume:  206     ISSN:  0036-8075     ISO Abbreviation:  Science     Publication Date:  1979 Nov 
Date Detail:
Created Date:  1979-12-29     Completed Date:  1979-12-29     Revised Date:  2007-03-19    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1105-8     Citation Subset:  IM; S    
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MeSH Terms
Aerospace Medicine*
Eye Movements
Kinesis / physiology
Touch / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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